I have a couple coleman coolers I use . I believe they said something like 8 day cooler , meaning ice will last 8 days . Which to me means better insulation inside and a better seal when closed . Always rock solid at 65% with my Heartfelt beads . They have a ledge inside that the trays from bargainhumidors.com fit perfectly on also . If all you can swing is a smaller cooler right now that is still better then nothing .
